Piston and plunger construction.



E. J. ENGMAN.

PISTON AND PLUNGER CONSTRUCTION.

APPLICATION FILED HA5. 8. 19:1.

1,258,549. Patented Mar. 5, 191.8.

10 11. J\ :fe

l/VI/EIVTOR Mam A TTOfM/EYS UNITED STATES PATENT OFFICE LEVAICD 3'.ENGMAIN', 0F SYRACUSE, NEW YORK, ASSIGNOR TO THE WILL & BAUMER 00.. 0FSYRACUSE, NEW YORK, A CORPORATION OF NEW YORK.

PISTON AND PLUNGER CONSTRUCTION.

Application filed March 8, 191?.

To all whom it may concern:

Be it known that I, Emu) J. Enciinis, a citizen of the United States,and a resident of Syracuse, in the county of Onondaga and State'of NewYork, have invented a certain new and useful Piston and PlungerConstruction, of which the following is a specification.

This invention has for its object a piston construction particularlyapplicable for can die molding machines or in other situations in whicha grease or liquid tight piston is desirable, which construction isespecially simple and economical; and the invention consists in thenovel features hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanyingdrawings in which like characters designate corresponding parts in allthe views.

Figure 1 is a sectional view of a piston embodying my invention and usedin connection with candle molding machines, the contiguous part of acandle molding machine bcin g also shown.

Fig. 2 is a face view of the piston, partly broken away.

Fig. is an elevation thereof, partly in section.

1 designates the piston which is here shown as having a head :2 which isangular or seven sided, the head being formed with a circumferentialgroove 3 and also with passages leading from the groove 3 out throughthe piston head and preferably through one of the faces as the rear faceof the piston head 52.

As here shown, the piston is formed with a pair of passages locatedclose together which are formed with inwardly or radially extendingportions t and with portions 5 extending substantially parallel with theaxis of the piston and opening through the rear face thereof.

6 is a piston ring or cord lying in the groove 3 and having its endportions lapped as at 7 and the parts 8 beyond the lapping portionsextending through the passages t, 5 and being exposed on the rear faceof the piston head 2.

Specification of Letters Patent.

Patented Mar. 5, 1918.

Serial No. 153,255.

When the cord has been drawn taut it may be held from loosening byindenting or upsetting the portion of the metal of the.

head between the passages 5 as indicated at 9.

I have here shown this piston as embodied in a candle molding machine inwhich 10 designates the mold supported by a suitable frame 11, and thepiston 1 is shown as having a hollow stem through which too wick of thecandle being molded is drawn.

The mold 10 is open at its top for receiving the melted wax or greaseand when the candle is formed and partly cooled it is pushed out of themold. by operating the piston or plunger 1.

Although this piston is shown as adapted for candle molding machines,obviously, it may be useful in other situations such as in grease cupsand the like.

This constructi n is particularly advantageous in that it provides anespecially simple and economical way of packing the piston.

What I claim is:

1. A piston construction comprising a piston head formed with acircumferential groove, and a cord lying in said groove and having itsend portions lapped, and the ends thereof brought out of the groovethrough the piston head, sulistantially as and for the purposedescribed.

2. A piston construction comprising a piston head having acircumferential groove and a pair of holes opening into the groove andthrough the rear face of the piston, and a cord lying in the groove andhaving its end portions lapped and the parts thereof beyond the lappassed out through said holes, sul'istantially as and for the purposespecified.

3. A piston comprising a head formed with a circumferential groove, andpassages extending inwardly or radially from the groove, and a cordlying in the groove and having its end portions lapped and the endportions beyond the lap secured in said passages, substantially as andfor the purpose set forth.

A piston comprising a piston head havthe rear face of the piston head,substantlally as and for the purpose described.

In testimony whereof, I have hereunto signed my name, at Syracuse, inthe county of Onondaga, and State of New York, this 9th day of February,1917.

EVALD J. ENGMANE ing a circumferential groove, and passages extendingradially inwardly from the bot tom of the groove, then outwardly throughthe rear face of the piston, and a cord lying in the groove and havingits end portions lapped and the portions thereof beyond the lap drawninto said passage and secured on Copies of this patent may be obtainedfor five cents each, by addressing the "Commissioner of Intent,

Washington, I)" G.

